Secondary burner for removing and burning any solid combustibles resulting from a primary municipal garbage or trash burner



y 30, 1967 H. J. UNGERLEIDER 3,322,503 SECONDARY BURNER FOR REMOVING AND BURNING ANY SOLID COMBUSTIBLES RESULTING FROM A PRIMARY MUNICIPAL GARBAGE on TRASH BURNER Filed April 15, 1964 v 2 Sheets-Sheet 1 y 1967 H J. UNGERLEIDER 3,322,508

SECONDARY BURNER FOR REMOVING AND BURNING ANY SOLID COMBUSTIBLES RESULTING FROM A PRIMARY MUNICIPAL GARBAGE OR TRASH'BURNER Filed April 15, 1964 2 Sheets-Sheet 2 INVENTOR irrae/r/ey United States Patent 3,322,508 SECONDARY BURNER FOR REMOVING AND BURNENG ANY SOLID COMBUSTIBLES RE- SULTING FROM A PRIMARY MUNICIPAL GARBAGE 0R TRASH BURNER Hugh J. Ungerleider, Louisville, Ky., assignor to American Compressed Steel Corporation, Louisville, Ky., a corporation of Kentucky Filed Apr. 15, 1964, Ser. No. 359,888 2 Claims. (Cl. 23-277) The present invention relates to a secondary burning arrangement and it particularly relates in connection with industrial combustion operations.

It is among the objects of the present invention to provide a novel secondary burning and settlement arrangement which will eifectively handle efl'luent from the burning of industrial wastes and which will also take care of and remove suspended solids or other particles from emission arising from primary burning units or incinerators.

Another object is to provide a method of handling combustible materials carried in gases and smokes so as to eliminate the same and remove the combustibles and collect any solids or noncombustible material therefrom.

A further object is to provide an efiicient system to control and prevent smoke and contaminates arising [from the burning of industrial smoke and air pollution Will be avoided.

Still further objects and advantages will appear in the more detailed description set forth below, it being understood, however, that this more detailed description is given by way of illustration and explanation only and not by way of limitation, since various changes therein may be made by those skilled in the art without departing from the scope and spirit of the present invention.

In accomplishing the above objects, it has been found most satisfactory according to one embodiment of the present invention to collect emission from the primary burning unit as close as possible to the outlet thereof and then to pass such smoke or polluted gases through a series of cells separated from each other by upwardly and downwardly extending baflles.

In the preferred form of the device, a series of large chambers or cells are provided in side by side relationship with the connection between the cells or compartments first [formed at the lower portion of two successive cells or compartments and then at the upper portion of two successive cells or compartments.

In the initial cell or compartment which receives the hot gases or emissions from the primary burning device, the stream is desirably provided with a burning arrangement so that the suspended or volatile combustible materials or solids will be consumed.

In one desirable form, the flow is from the lower part of the cell or compartment in which the gases have been caused to How downwardly and into the next cell-where the gases are caused to flow upwardly after they have been subjected to the secondary burning or combustion operation.

These two initial cells have resulted in a substantially complete combustion of any volatiles or suspended combustible solids and also in a deposit of a major portion of the ash and other particles therein.

3,322,508 Patented May 30, 1967 In a third cell which may communicate with the upper portion of the first cell, the downwardly flowing gases then may be subjected to a spray of water with or without a wetting agent such as glycol so as to remove any suspended materials which have not been eliminated in the first two cells or compartments.

Lastly, the combustion gases now have been clarified and with the solids substantially completely or largely removed, are passed into the lower portion of a final cell in which there is a substantial draft which will operate through all of the cells to cause a flow through the successive cells and the treatment that results.

Although the construction may be of varying shapes and forms, it i desirably made of a hot roll steel or boiler plate construction with the cells in one form of the invention having a height and Width of 20 feet and a space in the direction of the successive cells of 20 feet.

The first cell or cells may be lined with refractory material on all sides thereof so as to permit substantial heat or flame to be applied to the gases.

Although not limited thereto, the present invention is particularly designed for the handling of industrial wastes such as paper, wood and combustible refuse from various industrial operations.

It may also be applied to various municipal incinerators and even to eflluent where there is a large amount of combustible materials which may be discharged into the atmosphere.

It has a broad application to the burning of refuse of all sorts particularly where there is an eflluent containing in suspension a large amount of combustible particles or other powders or solids.

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawing wherein like reference characters denote corresponding parts throughout the several views:

FIG. 1 is a diagrammatic side sectional view of the secondary burning and settlement apparatus according to the present invention.

FIG. 2 is a transverse sectional view upon the line 22 of FIG. 1 showing the first cell in section.

Referring to the structure as shown in FIGS. 1 and 2, there is provided a main housing or chamber A having the inlet B from the primary refuse burner or other sources of the gases and with the outlets C at the other end of the structure A.

Interiorly the main housing or chamber A has the communicating cells or compartments D, E, F and G.

The initial compartment D may have one or more transverse burner L arrangements on the same or different sides thereof and directly transverse to the flow of the gases.

These chambers are separated from one another by the downwardly and upwardly extending baflles at H, J and K.

Although not limited thereto, the entire structure may be made of hot rolled plated steel /2" to in thickness including the walls of the structure as well as the interior 'bafiies.

Referring particularly to the structure, the inlet B will receive the effluent from the primary burner which will flow inwardly as indicated by the arrow 19.

The top wall will have an opening 21 receiving the lower end of the stack B which is suitably mounted 1n tight fashion.

The end walls 22 and 23 of FIG. 1 and the side walls 24 as shown in FIG. 2 together with the bottom wall 25 will complete the housing.

The bottom wall 25 will be suitably supported upon standards, and it will have the clean out doors or dump doors 26 for solids which have been removed from the cells D and E and 27 for liquids which have been removed in the cells F and G.

The interior of the walls 22 and 24, and the interior of the bafile H at the side of the initial cell D will be lined with a refractory material or fire brick so that additional combustion may take place in said first cell or compartment D to burn any suspended combustible materials in the gases passing inwardly through the stack as indicated by the arrow 19.

The burners L positioned at opposite sides may be adjustable so as to assume combustion taking place of any solids which may follow inwardly from the primary combustion operation.

There is desirably provided an obliquely extending baffle 28 meeting at 29 directly below the top wall 20 and extending downwardly and obliquely outwardly to the support beams 30 below the burners.

The flame from the burner L will impinge the oblique surfaces or sections 28 and 29, and the downwardly passing primary combustion gases will be divided in streams as indicated at 31 and 32 (see FIG. 2) so that there will be movement of the incoming primary combustion gases toward the flame of the gas burners and as they pass downwardly over the highly heated refractory or checker board walls 28 and 29.

This operation will result in not only thorough combustion but destruction of the combustible particles.

The downward stream of gases will be thoroughly agitated and dispersed and any combustible volatiles will be consumed.

The ash and unconsumed solids will then be deposited upon the bottom wall 25 at the lower part of the cell or compartment D and this deposition will be greatly increased by the reverse of direction and movement of the gases under the lower end 33 of the baflie H with a reversal of direction as indicated by the arrow 34 of FIG. 1.

The collected solids on the bottom 25 below the cells D and E may be collected from time to time and dispersed through the clean out door or other suitable dispersion device 26.

The cell E may also be lined with refractory material both at the side walls as well as on the faces of the baffles H and F so that any combustion may continue therein which has been initiated in the first cell or compartment D.

The gases will then pass as indicated by the arrow 35 over the top edge 36 of the vertical baflle J into the spray chamber F.

A series of spraying nozzles 37 may be used to spray water desirably containing a wetting agent such as diethylene glycol or some other polyhydric through the gases as they are passing down through the spray chamber F.

Any stream that may be created may be removed by suitable connections through the top wall 20 above the chamber F and the hot spray which will serve to cleanse the downwardly flowing gases in the chamber F, which will collect, on the bottom 25 and may be removed through the clean out or disposal opening 27.

The gases after this treatment will then pass under the lower edge 38 of the last baflle K and then pass upwardly through the cell or last compartment G to the outlet stacks C which may be provided with suit-able exhaust arrangements.

Although not limited thereto, it has been found that exhaust fans with a capacity of 35,000 feet per mile of vanaxial type are satisfactory for setting up a suflicient minus pressure of 1" to 4" of water to draw the gases through the inlet stack C and through the cells D, E, F and G and out through the short stack C.

The gases when they reach the outlet stack C will have had the combustible largely or altogether removed by the treatments in the cells D and E and will have been thoroughly washed in the chamber F and may be dispersed without pollution.

The ash and unconsumed solids are all removed in the first two cells D and E with the scrubbing in the third chamber F removing any residue.

As a result, any finely divided particles such as smoke and contaminates will not be dispersed into the atmosphere.

The device as shown will treat any eflluent from a primary burning unit or incinerator so that both combustibles and solid noncombustible material in suspension will be removed both by burning and scrubbing.

A minimal amount of pollutants will be left as the gases past upwardly through the final chamber G.

The number of combustion chambers D and E may be increased as may also the number of scrubbing chambers F so that instead of four chambers, there may be six, eight or even ten and the height as well as the width of the chamber may be greatly varied.

Depending upon the infiowing material passing in the direction of the arrow 19, the number of burners may be changed.

The burners also should be adjusted so that they may direct the flame in the proper manner inwardly in the direction desired and at a spacing from the refractory walls and at the proper position in respect to the oblique intermediate refraction element and the structures 28 and 29.

It is thus apparent that the applicants have provided a simple economical arrangement for disposing of effluents from industrial refuse burning procedures with a minimum of air pollution.

As many changes could be made in the above secondary burning arrangement, and many widely different embodiments of this invention could be made without departing from the scope of the claims, it is intended that all matter contained in the above description shall be interpreted as illustrative and not in a limiting sense.

Having now particularly described and ascertained the nature of the invention, and in what manner the same is to be performed, what I claimed is:

1. A secondary burner comprising an elongated rectangular burner chamber having first, second, third and fourth compartments of about equal volume and separated from each other, said chamber having a ceiling, a floor and side and end walls of refractory brick material and said chamber being also provided with overlapping baffles alternately connected to the floor and ceiling and respectively extending toward but terminating short of the ceiling and floor, said bafiles being equally spaced from and parallel to one another and being connected at their side edges to the end walls and overlapping vertically about mid-height of the burner chamber to form said successive series of first, second, third and fourth equal volume successive compartments, an inlet in the ceiling of the first compartment and parallel spaced outlets removing residual gases through the ceiling of the last compartment and oblique outwardly and downwardly extending baflle means in the first compartment to divide the incoming eflluent from the primary burner in the two streams and horizontal transverse burners positioned in the upper side of the first compartment to strike said oblique baflles and assure complete combustion.

2. A secondary burner arrangement for assuring combustion and destruction of solid combustibles resulting from a primary trash combustion operation comprising an elongated rectangular housing having top, side, end and bottom walls of refractory brick, a plurality of vertical overlapping baffles equally spaced from and parallel to each other and alternately connected to and extending downwardly from the top wall and upwardly from the bottom Wall to about mid height of the housing and perpendicular to the major elongated axis of the housing, said bafiles forming a series of compartments of approximately equal volume and an inlet to one compartment serving as an inlet compartment at one end and oblique 10 downwardly and outwardly diverging bafiles below said inlet extending downwardly from the top wall and terminating mid height of the inlet compartment and transverse horizontal burners mounted in the side walls of the inlet compartment and creating a combustion zone on top of said oblique bafiles.

References Cited UNITED STATES PATENTS 704,199 7/1902 Lee 23284 X 830,974 9/1906 Decarie 110-8 3,087,443 4/1963 Attanasio et a1. 23277 X MORRIS O. WOLK, Primary Examiner. I. H. TAYMAN, Assistant Examiner. 

2. A SECONDARY BURNER ARRNGEMENT FOR ASSURING COMBUSTION AND DESTRUCTION OF SOLID COMBUSTIBLES RESULTING FROM A PRIMARY TRASH COMBUSTION OPERATION COMPRISING AN ELONGATED RECTANGULAR HOUSING HAVING TOP, SIDE, END AND BOTTOM WALLS OF REFRACTORY BRICK, A PLURALITY OF VERTICAL OVERLAPPING BAFFLES EQUALLY SPACED FROM AND PARALLEL TO EACH OTHER AND ALTERNATELY CONNECTED TO AND EXTENDING DOWNWARDLY FROM THE TOP WALL AND UPWARDLY FROM THE BOTTOM WALL TO ABOUT MID HEIGHT OF THE HOUSING AND PERPENDICULAR TO THE MAJOR ELONGATED AXIS OF THE HOUSING, SAID BAFFLES FORMING A SERIES OF COMPARTMENTS OF APPROXIMATELY EQUAL VOLUME AND AN INLET TO ONE COMPARTMENT SERVING AS AN INLET COMPARTMENT AT ONE END AND OBLIQUE DOWNWARDLY AND OUTWARDLY DIVERGING BAFFLES BELOW SAID INLET EXTENDING DOWNWARDLY FROM THE TOP WALL AND TERMINATING MID HEIGHT OF THE INLET COMPARTMENT AND TRANSVERSE HORIZONTAL BURNERS MOUNTED IN THE SIDE WALLS OF THE INLET COMPARTMENT AND CREATING A COMBUSTION ZONE ON TOP OF SAID OBLIQUE BAFFLES. 